One of 6 Primordial Stones of infinite power to be used with the Mad Titan's Gauntlet.

When affixed to the Mad Titan's Gauntlet:

As an action, allows the user to cast the Time Stop or Foresight Spells.

Limitations imposed are at the discretion of the DM. Otherwise, the effect can be used at will without consuming a spell slot but still holds to the limitations of the spell itself.